/** converts binary to hexidecimal
*
* @param *input Binary data.
* @param len Length of binary data.
* @param **output NULL terminated string equivalent in hex.
*
* @return olen Length of output string not including NULL terminator.
*
* FIX Is there already one of these in the UCD SNMP codebase?
* The old one should be used, or this one should be moved to
* snmplib/snmp_api.c.
*/
u_int
binary_to_hex(const u_char * input, size_t len, char **output)
{
u_int olen = (len * 2) + 1;
char *s = (char *) calloc(1, olen), *op = s;
const u_char *ip = input;
while (ip - input < (int) len) {
*op++ = VAL2HEX((*ip >> 4) & 0xf);
*op++ = VAL2HEX(*ip & 0xf);
ip++;
}
*op = '\0';
*output = s;
return olen;
} /* end binary_to_hex() */
/** converts binary to hexidecimal
*
* @param *input Binary data.
* @param len Length of binary data.
* @param **dest NULL terminated string equivalent in hex.
* @param *dest_len size of destination buffer
* @param allow_realloc flag indicating if buffer can be realloc'd
*
* @return olen Length of output string not including NULL terminator.
*/
u_int
netsnmp_binary_to_hex(u_char ** dest, size_t *dest_len, int allow_realloc,
const u_char * input, size_t len)
{
u_int olen = (len * 2) + 1;
u_char *s, *op;
const u_char *ip = input;
if (dest == NULL || dest_len == NULL || input == NULL)
return 0;
if (NULL == *dest) {
s = (unsigned char *) calloc(1, olen);
*dest_len = olen;
}
else
s = *dest;
if (*dest_len < olen) {
if (!allow_realloc)
return 0;
*dest_len = olen;
if (snmp_realloc(dest, dest_len))
return 0;
}
op = s;
while (ip - input < (int) len) {
*op++ = VAL2HEX((*ip >> 4) & 0xf);
*op++ = VAL2HEX(*ip & 0xf);
ip++;
}
*op = '\0';
if (s != *dest)
*dest = s;
*dest_len = olen;
return olen;
} /* end netsnmp_binary_to_hex() */